Mechanical Pruning and Soil Organic Amending in Two Terroirs. Effects on Wine Chemical Composition and Sensory Profile

The knowledge about the interaction between mechanical pruning and soil organic amending is still scarce. This study aimed to examine effects of these two practices on wine quality. Syrah grapes from trial fields in Portugal subjected different systems (mechanical pruning; hand spur pruning) five amendment treatments (control, biochar, municipal solid waste compost, cattle manure, sewage sludge) were harvested vinified for four years. Mechanical significantly reduced alcoholic strength, pH, total anthocyanins. amendments, tendentially phenols tannin power, known as an “estimation astringency potential wines”. Tasters found low but significant differences global appreciation with system. Sludge tended reduce more than compost while biochar had no effect tasters’ preference when compared control. There was strong relation yield only above 6 kg/vine 8 depending terroir. has quality raises a certain level. Thus, this system, choice its amount must be done considering destiny produced grapes. To best our knowledge, are novelty.